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Finding the Fourth Proportional to 305,245.70, 420,753.59 and 240,610.13

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Solution

The fourth proportional to 305,245.70, 420,753.59 and 240,610.13 is: 331,659.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,245.70 : 420,753.59 = 240,610.13 : x
  2. Step 2: Convert to fraction form
    305,245.70/420,753.59 = 240,610.13/x
  3. Step 3: Cross multiply
    305,245.70x = 420,753.59 × 240,610.13
  4. Step 4: Simplify right side
    305,245.70x = 101,237,575,987.87
  5. Step 5: Solve for x
    x = 101,237,575,987.87/305,245.70
  6. Step 6: Final answer
    x = 331,659.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.